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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 407 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSWATER PUMP REPLACEMENT (4.3L ENGINE)REMOVAL PROCEDURE
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6

Removal Procedure

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Removal Procedure
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Loosen the air cleaner outlet duct clamp at the mass airflow/intake air temperature sensor.
    2. Fig 1: View Of Air Cleaner Outlet Duct Clamp
    GM360851Courtesy of GENERAL MOTORS CORP.
  2. Remove the positive crankcase ventilation (PCV) hose.
    3. Fig 2: Positive Crankcase Ventilation (PCV) Hose
    GM701705Courtesy of GENERAL MOTORS CORP.
  3. Remove the air cleaner adapter nut.
    4. Fig 3: View Of Air Cleaner Adapter Nut
    GM489179Courtesy of GENERAL MOTORS CORP.
  4. In order to remove the air cleaner outlet duct, pivot the duct upward until the hinge clip release from the lip on the throttle body.
    5. Fig 4: View Of Air Cleaner Outlet Duct
    GM489176Courtesy of GENERAL MOTORS CORP.
  5. Drain the cooling system. Refer to Draining and Filling Cooling System (without HP2) .
  6. Remove the cooling fan. Refer to Fan Replacement .
  7. Remove the drive belt. Refer to Drive Belt Replacement in Engine Mechanical - 4.3L.
  8. Reposition the radiator outlet hose clamps at the surge tank and water pump.
  9. Remove the radiator outlet hose from the surge tank.
  10. Remove the radiator outlet hose from the water pump.
    11. Fig 5: View Of Radiator Outlet Hose & Water Pump (4.3L)
    GM367001Courtesy of GENERAL MOTORS CORP.
  11. Reposition the water pump inlet hose clamps.
    12. Fig 6: View Of Water Pump Inlet Hose & Clamps
    GM182853Courtesy of GENERAL MOTORS CORP.
  12. Remove the water pump inlet hose.
  13. Using J 41240  , hold the water pump pulley, remove the water pump pulley bolts.
    14. Fig 7: Installing Fan, Water Pump Pulley & Bolts
    GM317191Courtesy of GENERAL MOTORS CORP.
  14. Remove the water pump bolts.
  15. Remove the water pump.
    16. Fig 8: View Of Water Pump & Bolts
    GM188054Courtesy of GENERAL MOTORS CORP.
  16. Remove and discard the water pump gaskets.
  17. Clean and inspect the water pump, if necessary. Refer to Water Pump Cleaning and Inspection .
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.